code: def test_force_roundtrip(
      self, mock_force_roundtrip: MagicMock
  ) -> None:
      s = bcs.ClientSession()
      s.force_roundtrip()
      assert mock_force_roundtrip.call_count == 1
      assert mock_force_roundtrip.call_args[0] == ()
      assert mock_force_roundtrip.call_args[1] == {}
  
file_path: bokeh/tests/unit/bokeh/client/test_session__client.py
imports: from __future__ import annotations
  import pytest
  from unittest.mock import MagicMock, patch
  import bokeh.client.session
label_desc: Use image node_id 10 for calling the Test_ClientSession obj's underlying member method code with example usage: obj.test_force_roundtrip(mock_force_roundtrip) without return types